The following initial rates data were obtained for 1.) What are the reactant ord
ID: 922412 • Letter: T
Question
The following initial rates data were obtained for
1.) What are the reactant orders?
Order of Br1- =
Order of BrO31- =
Order of H1+ =
2.) What are the units of the rate constant. Use exponents but no superscript. Separate M and s with a space. For example, use M-5 s-2 to indicate M-5·s-2.
3.) What is the value of the specific rate constant for the reaction (no units)? Hint: the rate constant for the reaction is not the same as the rate constant for the disappearance of Br1-.
k =
EXP [Br1-]o [BrO31-]o [H1+]o -[Br1-]/ t (M/s) 1 0.300 0.100 0.220 1.06e-02 2 0.450 0.100 0.220 1.59e-02 3 0.300 0.200 0.220 2.12e-02 4 0.300 0.100 0.550 6.62e-02Explanation / Answer
1) since the rate of the reaction increases by 1.5 times on intreasing the concentration of Br(-1) by 1.5 times, it is first order in Br(-). The rate doubles on doubling the concentration of BrO3(-). Hence it is first order with BrO3(-). The reaction rate increases by 4 times on doubling the concentration of H+. Hence it is second order with respect to H+ 2) rate is M/s. Hence the unit of rate constant is M-3 s-1 3) let it be k.so, Rate constant determined when the concentration of each reactant is unity i.e. one mole/dm3 then K is called specific rate constant. so k=1.06*10^-2
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.